Remove Go debugger plugin

In January Davide sent an e-mail to the mailing list to suggest removing
unmaintained language plugins such as Go and Java. The plan was to have
some cool down period to allow users to speak up, however after that the
plugins were never actually removed.

This patch removes the Go debugger plugin.

The plugin can be added again in the future if it is mature enough both
in terms of testing and maintenance commitment.

Discussion on the mailing list:
http://lists.llvm.org/pipermail/lldb-dev/2018-January/013171.html

Differential revision: https://reviews.llvm.org/D54057

llvm-svn: 346157

lldb/include/lldb/Symbol/TypeSystem.h

@@ -72,7 +72,6 @@ class TypeSystem : public PluginInterface {
   enum LLVMCastKind {
     eKindClang,
     eKindSwift,
-    eKindGo,
     eKindJava,
     eKindOCaml,
     kNumKinds

lldb/include/lldb/lldb-forward.h

@@ -107,7 +107,6 @@ class File;
 class FileSpec;
 class FileSpecList;
 class Flags;
-class GoASTContext;
 class TypeCategoryImpl;
 class FormatManager;
 class FormattersMatchCandidate;
@@ -354,7 +353,6 @@ typedef std::shared_ptr<lldb_private::File> FileSP;
 typedef std::shared_ptr<lldb_private::Function> FunctionSP;
 typedef std::shared_ptr<lldb_private::FunctionCaller> FunctionCallerSP;
 typedef std::shared_ptr<lldb_private::FuncUnwinders> FuncUnwindersSP;
-typedef std::unique_ptr<lldb_private::GoASTContext> GoASTContextUP;
 typedef std::shared_ptr<lldb_private::InlineFunctionInfo> InlineFunctionInfoSP;
 typedef std::shared_ptr<lldb_private::Instruction> InstructionSP;
 typedef std::shared_ptr<lldb_private::InstrumentationRuntime>

lldb/packages/Python/lldbsuite/test/decorators.py

@@ -600,28 +600,6 @@ def skipUnlessDarwin(func):
     return skipUnlessPlatform(lldbplatformutil.getDarwinOSTriples())(func)
 
 
-def skipUnlessGoInstalled(func):
-    """Decorate the item to skip tests when no Go compiler is available."""
-
-    def is_go_missing(self):
-        compiler = self.getGoCompilerVersion()
-        if not compiler:
-            return "skipping because go compiler not found"
-        match_version = re.search(r"(\d+\.\d+(\.\d+)?)", compiler)
-        if not match_version:
-            # Couldn't determine version.
-            return "skipping because go version could not be parsed out of {}".format(
-                compiler)
-        else:
-            min_strict_version = StrictVersion("1.4.0")
-            compiler_strict_version = StrictVersion(match_version.group(1))
-            if compiler_strict_version < min_strict_version:
-                return "skipping because available version ({}) does not meet minimum required version ({})".format(
-                    compiler_strict_version, min_strict_version)
-        return None
-    return skipTestIfFn(is_go_missing)(func)
-
-
 def skipIfHostIncompatibleWithRemote(func):
     """Decorate the item to skip tests if binaries built on this host are incompatible."""