Remove useless assignments

Warnings found by the the Clang Static Analyzer.

Modules/faulthandler.c

@@ -1005,9 +1005,10 @@ static int
 faulthandler_env_options(void)
 {
     PyObject *xoptions, *key, *module, *res;
-    int enable;
 
     if (!Py_GETENV("PYTHONFAULTHANDLER")) {
+        int has_key;
+
         xoptions = PySys_GetXOptions();
         if (xoptions == NULL)
             return -1;
@@ -1016,13 +1017,11 @@ faulthandler_env_options(void)
         if (key == NULL)
             return -1;
 
-        enable = PyDict_Contains(xoptions, key);
+        has_key = PyDict_Contains(xoptions, key);
         Py_DECREF(key);
-        if (!enable)
+        if (!has_key)
             return 0;
     }
-    else
-        enable = 1;
 
     module = PyImport_ImportModule("faulthandler");
     if (module == NULL) {

Python/import.c

@@ -1733,7 +1733,6 @@ find_module_path(PyObject *fullname, PyObject *name, PyObject *path,
     Py_UNICODE buf[MAXPATHLEN+1];
     Py_ssize_t buflen = MAXPATHLEN+1;
     PyObject *path_unicode, *filename;
-    const Py_UNICODE *base;
     Py_ssize_t len;
     struct stat statbuf;
     static struct filedescr fd_package = {"", "", PKG_DIRECTORY};
@@ -1751,7 +1750,6 @@ find_module_path(PyObject *fullname, PyObject *name, PyObject *path,
     else
         return 0;
 
-    base = PyUnicode_AS_UNICODE(path_unicode);
     len = PyUnicode_GET_SIZE(path_unicode);
     if (len + 2 + PyUnicode_GET_SIZE(name) + MAXSUFFIXSIZE >= buflen) {
         Py_DECREF(path_unicode);
@@ -2275,12 +2273,10 @@ case_ok(PyObject *filename, Py_ssize_t prefix_delta, PyObject *name)
 static int
 find_init_module(PyObject *directory)
 {
-    size_t len;
     struct stat statbuf;
     PyObject *filename;
     int match;
 
-    len = PyUnicode_GET_SIZE(directory);
     filename = PyUnicode_FromFormat("%U%c__init__.py", directory, SEP);
     if (filename == NULL)
         return -1;