refactor: remove unnecessary default param values

swc/private/swc.bzl

@@ -110,7 +110,7 @@ def _replace_ext(f, ext_map):
         return new_ext
     return None
 
-def _calculate_js_out(src, out_dir = None, root_dir = None, js_outs = []):
+def _calculate_js_out(src, out_dir, root_dir, js_outs = []):
     if not _is_supported_src(src):
         return None
 
@@ -135,7 +135,7 @@ def _calculate_js_out(src, out_dir = None, root_dir = None, js_outs = []):
             break
     return js_out
 
-def _calculate_js_outs(srcs, out_dir = None, root_dir = None):
+def _calculate_js_outs(srcs, out_dir, root_dir):
     if out_dir == None:
         js_srcs = []
         for src in srcs:
@@ -146,7 +146,7 @@ def _calculate_js_outs(srcs, out_dir = None, root_dir = None):
 
     return [f2 for f2 in [_calculate_js_out(f, out_dir, root_dir) for f in srcs] if f2]
 
-def _calculate_map_out(src, source_maps, out_dir = None, root_dir = None):
+def _calculate_map_out(src, source_maps, out_dir, root_dir):
     if source_maps in ["false", "inline"]:
         return None
     if not _is_supported_src(src):
@@ -165,7 +165,7 @@ def _calculate_map_out(src, source_maps, out_dir = None, root_dir = None):
         map_out = paths.join(out_dir, map_out)
     return map_out
 
-def _calculate_map_outs(srcs, source_maps, out_dir = None, root_dir = None):
+def _calculate_map_outs(srcs, source_maps, out_dir, root_dir):
     return [f2 for f2 in [_calculate_map_out(f, source_maps, out_dir, root_dir) for f in srcs] if f2]
 
 def _calculate_source_file(ctx, src):