Remove subscript binary op fragments since this had a dedicated node type

ASTNode.cpp

@@ -34,7 +34,7 @@ const char* ASTBinary::op_str() const
         ".", " ** ", " * ", " / ", " // ", " % ", " + ", " - ",
         " << ", " >> ", " & ", " ^ ", " | ", " and ", " or ",
         " += ", " -= ", " *= ", " /= ", " %= ", " **= ", " <<= ",
-        " >>= ", " &= ", " ^= ", " |= ", " //= ", "["
+        " >>= ", " &= ", " ^= ", " |= ", " //= "
     };
     return s_op_strings[op()];
 }

ASTNode.h

@@ -97,7 +97,7 @@ public:
         BIN_OR, BIN_LOG_AND, BIN_LOG_OR, BIN_IP_ADD, BIN_IP_SUBTRACT,
         BIN_IP_MULTIPLY, BIN_IP_DIVIDE, BIN_IP_MODULO, BIN_IP_POWER,
         BIN_IP_LSHIFT, BIN_IP_RSHIFT, BIN_IP_AND, BIN_IP_XOR, BIN_IP_OR,
-        BIN_IP_FLOOR, BIN_SUBSCR
+        BIN_IP_FLOOR,
     };
 
     ASTBinary(PycRef<ASTNode> left, PycRef<ASTNode> right, int op,

ASTree.cpp

@@ -683,8 +683,6 @@ void print_src(PycRef<ASTNode> node, PycModule* mod, int indent)
             print_ordered(node, bin->left(), mod, indent);
             printf("%s", bin->op_str());
             print_ordered(node, bin->right(), mod, indent);
-            if (bin->op() == ASTBinary::BIN_SUBSCR)
-                printf("]");
         }
         break;
     case ASTNode::NODE_UNARY: