Revert "	new file:   Library/Formula/yacas.rb"

This reverts commit 84d77f558ffeff1344a986ebb94ece59ea70758a.
Revert "	modified:   Library/Formula/gcc.rb"

This reverts commit a9ce4b2edc439b6f196bcf2151a13f1ffea3a9ae.
Revert "	new file:   Library/Formula/gcc.rb"

This reverts commit 2f9265b3ede219b5e5107356b455933cdfc482a8.
Revert "Revert "	new file:   Library/Formula/yacas.rb""

This reverts commit 747db9644fd61e3a0acadc901b6ac81d8e178c33.

	new file:   Library/Formula/yacas.rb