Remove useless lines from Configtool

I don't know what these lines were intended for, but the 'idx'
variable is not used anywhere else, so setting it is pointless.

configtool/thermistortablefile.py

@@ -99,11 +99,8 @@ def BetaTable(ofp, params, names, settings, finalTable):
 
   hiadc = thrm.setting(0)[0]
   N = int(settings.numTemps)
-  step = int(hiadc / (N - 1))
-  idx = range(1, int(hiadc), step)
 
-  while len(idx) > N:
-    del idx[0]
+  # Calculate actual temps for all ADC values
 
   for i in range(1, int(hiadc), step):
     t = int(thrm.temp(i))
@@ -146,10 +143,6 @@ def SteinhartHartTable(ofp, params, names, settings, finalTable):
   hiadc = thrm.setting(0)[0]
   N = int(settings.numTemps)
   step = int(hiadc / (N - 1))
-  idx = range(1, int(hiadc), step)
-
-  while len(idx) > N:
-    del idx[0]
 
   for i in range(1, int(hiadc), step):
     t = int(thrm.temp(i))