remove LDA_C_PW from q2dc

parser/parser-quantum-espresso/QuantumEspressoXC.py

@@ -941,6 +941,9 @@ CORRELATION_GRADIENT_CORRECTION = [
         'xc_terms': [{
             'XC_functional_name': "GGA_C_Q2D",
         }],
+        'xc_terms_subtract': [{
+            'XC_functional_name': 'LDA_C_PW',
+        }],
         'xc_section_method': {
             'x_qe_xc_igcc_name':       "q2dc",
             'x_qe_xc_igcc_comment':    "Q2D correlation grad corr",

test/xc_functionals/refactor_test/testuite-xc.ref.log

@@ -485,9 +485,6 @@ qe_xc: 0.00 SLA+PW+Q2DX+Q2DC ( 1  4 19 12 0 0)
   },
   {
     "XC_functional_name": "GGA_X_Q2D"
-  },
-  {
-    "XC_functional_name": "LDA_C_PW"
   }
 ]
 qe_xc: 0.00 VDW-DF ( 1 4 4 0 1)