Revert "Look for clang in .mozbuild directory for Linux on aarch64, but one has to manually download and move a build there, since mach bootstrap does not work for aarch64 Linux for now."
Revert "Look for clang in .mozbuild directory for Linux on aarch64, but one has to manually download and move a build there, since mach bootstrap does not work for aarch64 Linux for now."

This reverts commit b39f2fb9c48a1190d97069120a0b45ed5753758c.

MozillaSecurity/funfuzz,nth10sd/funfuzz,nth10sd/funfuzz,nth10sd/funfuzz,MozillaSecurity/funfuzz,MozillaSecurity/funfuzz