Remove removal_sheet from valid sheet types (not implemented)

lemi2seed/config/config.ini

@@ -42,8 +42,6 @@ credential_sheet = Credential Sheet for Long-Period Magnetotelluric Instrument
         geo_name = B15
         submitter_author = B16
         submitter_organization = B17
-    [[removal_sheet]]
-        comments =
 
 [Run]
     [[install_sheet]]
@@ -70,9 +68,6 @@ credential_sheet = Credential Sheet for Long-Period Magnetotelluric Instrument
         inst_specs = B26
         meas_azimuth = F40, F41, F42, F43
         meas_tilt = H40, H41, H42, H43
-    [[removal_sheet]]
-        contact_resistance_end =
-        dc_end =
 
 [Mag]
     [[install_sheet]]