Remove deprecated components

[saschanaz]

Remove bindings_generator (with CppHeaderParser), demangler, and namespacer.

[kripken]

lgtm, thanks.

The other.test_stdin was an existing error meanwhile fixed on incoming, I believe?

I think we can also remove tools/third_party/gcc_demangler.js (but not the .c, it's used in a test)

[saschanaz]

The other.test_stdin was an existing error meanwhile fixed on incoming, I believe?

A closure error, so it must be.

I think we can also remove tools/third_party/gcc_demangler.js (but not the .c, it's used in a test)

It's test_gcc_unmangler but do we even need it?

[kripken]

The gcc unmangler test itself? Yes, it's a useful test I think, it's kind of weird C code, good for coverage.