[WebAssembly] Remove an unused argument from writeSPToMemory (NFC)

Reviewers: dschuff

Subscribers: dschuff, sbc100, sunfish, llvm-commits

Differential Revision: https://reviews.llvm.org/D50933

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@340230 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed