初步清理 t. 类型异味

Test/App/string_min_test.vp

@@ -1,9 +1,9 @@
-import stdio
-import t, c
-import string
-
-
-def string_min_test() -> int:
-    l: t.CSizeT = string.strlen("Hello")
-    stdio.printf("strlen(Hello)=%lu\n", l)
-    return 0
+import stdio
+import t, c
+import string
+
+
+def string_min_test() -> int:
+    l: sizet = string.strlen("Hello")
+    stdio.printf("strlen(Hello)=%lu\n", l)
+    return 0