Update tools/v8_gypfiles/v8.gyp

Co-authored-by: Michaël Zasso <targos@protonmail.com>

Author: luyahan

tools/v8_gypfiles/v8.gyp

@@ -274,7 +274,7 @@
             '<(V8_ROOT)/src/builtins/mips/builtins-mips.cc',
           ],
         }],
-        ['v8_target_arch=="riscv64" or v8_target_arch=="riscv64"', {
+        ['v8_target_arch=="riscv64"', {
           'sources': [
             '<(V8_ROOT)/src/builtins/riscv64/builtins-riscv64.cc',
           ],