win32: code shrink execve(2) implementation

Commit 6d6856355a (win32: handle -1 return status from execve(2))
added a test of errno to distinguish between failure to run a
program and the program returning -1.

Subsequent changes in commit 9db9b34ada (win32: ignore ctrl-c in
parent of execve(2)) make this test unnecessary.  Remove it.

Saves 16-32 bytes.

1 files changed, 2 insertions, 2 deletions

diff --git a/win32/process.c b/win32/process.c
index a07ea06ed..b51f25d5c 100644
--- a/win32/process.c
+++ b/win32/process.c
@@ -408,7 +408,7 @@ int
 mingw_execvp(const char *cmd, char *const *argv)
 {
         intptr_t ret = mingw_spawnvp(P_NOWAIT, cmd, argv);
-        if (ret != -1 || errno == 0)
+        if (ret != -1)
                 wait_for_child((HANDLE)ret);
         return ret;
 }
@@ -417,7 +417,7 @@ int
 mingw_execve(const char *cmd, char *const *argv, char *const *envp)
 {
         intptr_t ret = mingw_spawn_interpreter(P_NOWAIT, cmd, argv, envp, 0);
-        if (ret != -1 || errno == 0)
+        if (ret != -1)
                 wait_for_child((HANDLE)ret);
         return ret;
 }