Revert r320942, "[ASTImporter] Support importing FunctionTemplateDecl and CXXDependen...

Revert r320942, "[ASTImporter] Support importing FunctionTemplateDecl and CXXDependentScopeMemberExpr"

Caused a test failure on Windows:

[ RUN      ] ImportExpr.ImportCXXDependentScopeMemberExpr
C:\b\rr\tmppzcp4w\w\src\third_party\llvm\tools\clang\unittests\AST\ASTImporterTest.cpp(526): error: Value of: testImport("template <typename T> class C { T t; };" "template <typename T> void declToImport() {" "  C<T> d;" "  d.t;" "}", Lang_CXX, "", Lang_CXX, Verifier, functionTemplateDecl(has(functionDecl(has(compoundStmt( has(cxxDependentScopeMemberExpr())))))))
  Actual: false (Could not find match)
Expected: true
C:\b\rr\tmppzcp4w\w\src\third_party\llvm\tools\clang\unittests\AST\ASTImporterTest.cpp(534): error: Value of: testImport("template <typename T> class C { T t; };" "template <typename T> void declToImport() {" "  C<T> d;" "  (&d)->t;" "}", Lang_CXX, "", Lang_CXX, Verifier, functionTemplateDecl(has(functionDecl(has(compoundStmt( has(cxxDependentScopeMemberExpr())))))))
  Actual: false (Could not find match)
Expected: true
[  FAILED  ] ImportExpr.ImportCXXDependentScopeMemberExpr (37 ms)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@321139 91177308-0d34-0410-b5e6-96231b3b80d8