ICU-13491 Merging a fix for zonemeta double free issue (#13301/r40324) from trunk to maint-59.

X-SVN-Rev: 40675
diff --git a/icu4c/source/i18n/zonemeta.cpp b/icu4c/source/i18n/zonemeta.cpp
index 84a9657..e163b00 100644
--- a/icu4c/source/i18n/zonemeta.cpp
+++ b/icu4c/source/i18n/zonemeta.cpp
@@ -690,7 +690,6 @@
                     mzMappings = new UVector(deleteOlsonToMetaMappingEntry, NULL, status);
                     if (U_FAILURE(status)) {
                         delete mzMappings;
-                        deleteOlsonToMetaMappingEntry(entry);
                         uprv_free(entry);
                         break;
                     }