src: remove ignore GCC -Wcast-function-type for v8
This reverts Commit 3ff2aece ("src: ignore GCC -Wcast-function-type for v8.h") and Commit
2462a2c5 ("src: fix ignore GCC -Wcast-function-type for older compilers") as this has
now been included in the V8 version being used.
Refs:
https://github.com/v8/v8/commit/f08cbfdc4051266e4200b6e26775d35307b1259b
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
commit message follows commit guidelines