[goldctl] Remove test for CloudClient#matchImageAgainstBaseline() that uses a fake imgmatching.Matcher.

The deleted test became obsolete after TestCloudClient_MatchImageAgainstBaseline_FuzzyMatching_UntriagedImage_Success was introduced, which tests CloudClient#matchImageAgainstBaseline() using a real imgmatchng.Matcher as opposed to a fake one.

This CL also removes mock.MatcherFactory, which was only used by the deleted test.

A followup CL will replace the imgmatching.MatcherFactory interface (which was only introduced for testing purposes) and its imgmatching.MatcherFactoryImpl implementation with a factory function.

Bug: skia:9527
Change-Id: Id3cb253887e84a3cb1c0f2301b0a1abca0694f1e
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/279017
Commit-Queue: Leandro Lovisolo <lovisolo@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
diff --git a/gold-client/go/goldclient/goldclient_test.go b/gold-client/go/goldclient/goldclient_test.go
index aa9110b..f3c96b4 100644
--- a/gold-client/go/goldclient/goldclient_test.go
+++ b/gold-client/go/goldclient/goldclient_test.go
@@ -1661,55 +1661,6 @@
 	assert.Contains(t, err.Error(), "unrecognized image matching algorithm")
 }
 
-// fakeMatcher implements the imgmatching.Matcher interface.
-type fakeMatcher bool
-
-// Match implements the imgmatching.Matcher interface.
-func (v fakeMatcher) Match(_, _ image.Image) bool { return bool(v) }
-
-// TODO(lovisolo): Replace this test with one that uses a real non-exact image matching algorithm
-//                 once one is implemented.
-func TestCloudClient_MatchImageAgainstBaseline_FakeNonExactAlgorithm_DownloadsMostRecentPositiveDigest_ImagesCorrectlyPassedToAlgorithm_Success(t *testing.T) {
-	unittest.MediumTest(t) // This test reads/writes a small amount of data from/to disk.
-
-	const testName = types.TestName("my_test")
-	const traceId = tiling.TraceID(",name=my_test,")
-	imageBytes := imageToPngBytes(t, image1)
-	const digest = types.Digest("11111111111111111111111111111111")
-	optionalKeys := map[string]string{
-		imgmatching.AlgorithmOptionalKey: "FakeAlgorithm",
-	}
-
-	const latestPositiveDigestRpcUrl = "https://testing-gold.skia.org/json/latestpositivedigest/,name=my_test,"
-	const latestPositiveDigestResponse = `{"digest":"22222222222222222222222222222222"}`
-	const latestPositiveDigestGcsPath = "gs://skia-gold-testing/dm-images-v1/22222222222222222222222222222222.png"
-	latestPositiveImageBytes := imageToPngBytes(t, image2)
-
-	test := func(name string, matcherReturnValue bool) {
-		t.Run(name, func(t *testing.T) {
-			mockMatcherFactory := &mocks.MatcherFactory{}
-
-			goldClient, cleanup, httpClient, gcsClient := makeGoldClientForMatchImageAgainstBaselineTests(t)
-			goldClient.imgMatcherFactory = mockMatcherFactory
-			defer cleanup()
-			defer mockMatcherFactory.AssertExpectations(t)
-			defer httpClient.AssertExpectations(t)
-			defer gcsClient.AssertExpectations(t)
-
-			httpClient.On("Get", latestPositiveDigestRpcUrl).Return(httpResponse([]byte(latestPositiveDigestResponse), "200 OK", http.StatusOK), nil)
-			gcsClient.On("Download", testutils.AnyContext, latestPositiveDigestGcsPath, filepath.Join(goldClient.workDir, digestsDirectory)).Return(latestPositiveImageBytes, nil)
-			mockMatcherFactory.On("Make", optionalKeys).Return(imgmatching.AlgorithmName("FakeAlgorithm"), fakeMatcher(matcherReturnValue), nil)
-
-			matches, err := goldClient.matchImageAgainstBaseline(testName, traceId, imageBytes, digest, optionalKeys)
-			assert.NoError(t, err)
-			assert.Equal(t, matcherReturnValue, matches)
-		})
-	}
-
-	test("matching algorithm says images match, returns true", true)
-	test("matching algorithm says images do not match, returns false", false)
-}
-
 func TestCloudClient_GetDigestFromCacheOrGCS_NotInCache_DownloadsImageFromGCS_Success(t *testing.T) {
 	unittest.MediumTest(t) // This tests reads/writes a small amount of data from/to disk.
 
diff --git a/gold-client/go/mocks/MatcherFactory.go b/gold-client/go/mocks/MatcherFactory.go
deleted file mode 100644
index 42aa95a..0000000
--- a/gold-client/go/mocks/MatcherFactory.go
+++ /dev/null
@@ -1,43 +0,0 @@
-// Code generated by mockery v1.0.0. DO NOT EDIT.
-
-package mocks
-
-import (
-	mock "github.com/stretchr/testify/mock"
-	imgmatching "go.skia.org/infra/gold-client/go/imgmatching"
-)
-
-// MatcherFactory is an autogenerated mock type for the MatcherFactory type
-type MatcherFactory struct {
-	mock.Mock
-}
-
-// Make provides a mock function with given fields: optionalKeys
-func (_m *MatcherFactory) Make(optionalKeys map[string]string) (imgmatching.AlgorithmName, imgmatching.Matcher, error) {
-	ret := _m.Called(optionalKeys)
-
-	var r0 imgmatching.AlgorithmName
-	if rf, ok := ret.Get(0).(func(map[string]string) imgmatching.AlgorithmName); ok {
-		r0 = rf(optionalKeys)
-	} else {
-		r0 = ret.Get(0).(imgmatching.AlgorithmName)
-	}
-
-	var r1 imgmatching.Matcher
-	if rf, ok := ret.Get(1).(func(map[string]string) imgmatching.Matcher); ok {
-		r1 = rf(optionalKeys)
-	} else {
-		if ret.Get(1) != nil {
-			r1 = ret.Get(1).(imgmatching.Matcher)
-		}
-	}
-
-	var r2 error
-	if rf, ok := ret.Get(2).(func(map[string]string) error); ok {
-		r2 = rf(optionalKeys)
-	} else {
-		r2 = ret.Error(2)
-	}
-
-	return r0, r1, r2
-}
diff --git a/gold-client/go/mocks/generate.go b/gold-client/go/mocks/generate.go
index 8996764..90f412f 100644
--- a/gold-client/go/mocks/generate.go
+++ b/gold-client/go/mocks/generate.go
@@ -4,4 +4,3 @@
 //go:generate mockery -name GCSUploader -dir ../goldclient -output .
 //go:generate mockery -name GoldClient -dir ../goldclient -output .
 //go:generate mockery -name HTTPClient -dir ../goldclient -output .
-//go:generate mockery -name MatcherFactory -dir ../imgmatching -output .