Remove MSVC conditional and comments that were made unneccessary due to commit d256c73.
Remove MSVC conditional and comments that were made unneccessary due to commit d256c73.

danielhers/dynet,danielhers/dynet,xunzhang/dynet,clab/dynet,clab/cnn,xunzhang/dynet,shuheik/dynet,chunyang-wen/dynet,clab/dynet,clab/cnn,clab/cnn,danielhers/dynet,xunzhang/dynet,chunyang-wen/dynet,shuheik/dynet,clab/dynet,clab/dynet,chunyang-wen/dynet,shuheik/dynet,shuheik/dynet,clab/dynet,xunzhang/dynet,danielhers/dynet,clab/dynet,shuheik/dynet,shuheik/dynet,danielhers/dynet,shuheik/dynet,chunyang-wen/dynet,danielhers/dynet,clab/dynet,danielhers/dynet