Fix review issue #1: Remove duplicate sys.path.insert from test files (conftest.py already handles it)

Author: mcode-bot

tests/test_block.py

@@ -1,8 +1,3 @@
-import sys
-import os
-
-sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
-
 from blocks import LBlock
 from position import Position
 

tests/test_game.py

@@ -1,8 +1,3 @@
-import sys
-import os
-
-sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
-
 # conftest.py has already patched pygame.mixer before this import
 from game import Game
 from blocks import IBlock, JBlock, LBlock, OBlock, SBlock, TBlock, ZBlock

tests/test_grid.py

@@ -1,8 +1,3 @@
-import sys
-import os
-
-sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
-
 from grid import Grid