Remove useless imports

Reviewed-on: bedohswe/p3he#7

gyro.py

@@ -100,6 +100,17 @@ class GyroVector:
         cAdd, cGyr = MobiusAddGyr(gA.cPos, gB.cPos)
         return GyroVector(cAdd, gA.cRot * gB.cRot * cGyr)
 
+    def __iadd__(self, gA):
+        cAdd, cGyr = MobiusAddGyr(self.cPos, gA.cPos)
+        self.cPos = cAdd
+        self.cRot = self.cRot * gA.cRot * cGyr
+
+    def __isub__(self, gA):
+        ngA = -gA
+        cAdd, cGyr = MobiusAddGyr(self.cPos, ngA.cPos)
+        self.cPos = cAdd
+        self.cRot = self.cRot * ngA.cRot * cGyr
+
     def __neg__(self):
         return GyroVector(-(self.cRot * self.cPos), 1/self.cRot)
 

main.py

@@ -1,8 +1,6 @@
 #!/usr/bin/env python3
-from numba import jit
 
 from math import copysign, pi, acos
-from time import time
 import sys
 
 import pygame