account for removal of LDA_X from rw86 and c09x

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

@@ -266,9 +266,6 @@ qe_xc: 0.00 VDW-DF-C09 ( 1  4 16  0 1 0)
   {
     "XC_functional_name": "LDA_C_PW"
   },
-  {
-    "XC_functional_name": "LDA_X"
-  },
   {
     "XC_functional_name": "x_qe_VDW_DF1"
   }
@@ -347,9 +344,6 @@ qe_xc: 0.00 RVV10 ( 1  4 13  4 3 0)
   {
     "XC_functional_name": "LDA_C_PW"
   },
-  {
-    "XC_functional_name": "LDA_X"
-  },
   {
     "XC_functional_name": "x_qe_VDW_RVV10"
   }
@@ -653,9 +647,6 @@ qe_xc: 0.00 VDW-DF2 ( 1  4 13  0 2 0)
   {
     "XC_functional_name": "LDA_C_PW"
   },
-  {
-    "XC_functional_name": "LDA_X"
-  },
   {
     "XC_functional_name": "x_qe_VDW_DF2"
   }