Revert "O3 and other optimizations"

This reverts commit be1f50607b8c12086a3a707036749b3a9e8746b1.
Revert "Add the Custom Toolchain Triggers"

This reverts commit f4c3076dc878df9878dcba8197a05bddd86a57c0.
Revert "GCC Freedom"

This reverts commit 9f3af9b8ef336a595cf058e9ff17d4a6dba4ec84.
Revert "Show GCC version in build startup"

This reverts commit 0f0240a56b7ff8bce6b3e5686c0d707e44f5bbfa.