Remove the empty analysis diagnostics file

This file hasn't had any diagnostics in it since 2012, so I think we're
safe to remove this file.

Author: AaronBallman

clang/include/clang/Basic/Diagnostic.td

@@ -157,7 +157,6 @@ class DefaultRemark { Severity DefaultSeverity = SEV_Remark; }
 
 // Definitions for Diagnostics.
 include "DiagnosticASTKinds.td"
-include "DiagnosticAnalysisKinds.td"
 include "DiagnosticCommentKinds.td"
 include "DiagnosticCommonKinds.td"
 include "DiagnosticCrossTUKinds.td"