LGTM: Minor fixes to FreeCADApp.py

LGTM flagged several redundant imports, and was confused by the else
clause of one loop. This commit removes those imports, and because of
the loop's construction, removes the else entirely and lets the loop
fall through to the error state if it fails to find what it's looking
for.

src/App/FreeCADInit.py

@@ -34,18 +34,17 @@ def removeFromPath(module_name):
 	"""removes the module from the sys.path. The entry point for imports
 		will therefore always be FreeCAD.
 		eg.: from FreeCAD.Module.submodule import function"""
-	import sys, os
+	import sys
 	paths = sys.path
 	for path in paths:
 		if module_name in path:
 			sys.path.remove(path)
 			return
-	else:
-		Wrn(module_name + " not found in sys.path\n")
+	Wrn(module_name + " not found in sys.path\n")
 
 def setupSearchPaths(PathExtension):
 	# DLL resolution in Python 3.8 on Windows has changed
-	import sys, os
+	import sys
 	if sys.platform == 'win32' and hasattr(os, "add_dll_directory"):
 		if "FREECAD_LIBPACK_BIN" in os.environ:
 			os.add_dll_directory(os.environ["FREECAD_LIBPACK_BIN"])
@@ -253,7 +252,7 @@ App.__unit_test__ = []
 Log ('Init: starting App::FreeCADInit.py\n')
 
 try:
-    import sys,os,traceback,io,inspect
+    import sys,os,traceback,inspect
     from datetime import datetime
 except ImportError:
     FreeCAD.Console.PrintError("\n\nSeems the python standard libs are not installed, bailing out!\n\n")
@@ -632,7 +631,6 @@ FreeCAD.Logger = FCADLogger
 
 # init every application by importing Init.py
 try:
-	import traceback
 	InitApplications()
 except Exception as e:
 	Err('Error in InitApplications ' + str(e) + '\n')