Remove -Wno-maybe-uninitialized and -Wno-unused-parameter.

For -Wno-maybe-uninitialized, i didn't get any warnings with gcc, compiling the normal debug build, or with RELEASE=1, or with TILES=1, and clang already doesn't suppress this warning.

As i did get some before, i'm guessing the last cases that raised this warning have been fixed somewhere along the line.

For -Wno-unused-parameter, i resolved all the warnings to a "good enough" level. Compiles non-tiles and tiles builds on linux gcc with no warnings.