ICU-21373 Remove wrong cast to avoid CFI
diff --git a/icu4c/source/common/locid.cpp b/icu4c/source/common/locid.cpp
index cc25414..1efe0da 100644
--- a/icu4c/source/common/locid.cpp
+++ b/icu4c/source/common/locid.cpp
@@ -1457,7 +1457,7 @@
         int32_t variantsStart = out.length();
         for (int32_t i = 0; i < variants.size(); i++) {
              out.append(SEP_CHAR, status)
-                 .append((const char*)((UVector*)variants.elementAt(i)),
+                 .append((const char*)(variants.elementAt(i)),
                          status);
         }
         T_CString_toUpperCase(out.data() + variantsStart);