Peter Collingbourne 85f5302a71 Bitcode: Remove the remnants of the BitcodeDiagnosticInfo class.
The BitcodeReader no longer produces BitcodeDiagnosticInfo diagnostics.
The only remaining reference was in the gold plugin; the code there has been
dead since we stopped producing InvalidBitcodeSignature error codes in r225562.
While at it remove the InvalidBitcodeSignature error code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@286326 91177308-0d34-0410-b5e6-96231b3b80d8
2016-11-09 01:09:11 +00:00
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