Remove "Explanation" column

src/sliderulestab.cpp

@@ -160,8 +160,6 @@ QVariant EncodingModel::headerData(int section, Qt::Orientation orientation,
         return QString("Type");
       case DESCRIPTION:
         return QString("Description");
-      case EXPLANATION:
-        return QString("Explanation");
       case OPCODE:
         return QString("Opcode");
       case FIELD0:
@@ -208,9 +206,6 @@ QVariant EncodingModel::data(const QModelIndex &index, int role) const {
         return "TODO";
       case DESCRIPTION:
         return QString(instr->description());
-      case EXPLANATION:
-        // TODO(raccog): Include an instruction's pseudocode in isainfo
-        return QString("TODO");
       case OPCODE:
         return QString(instr->name());
       case FIELD0:

src/sliderulestab.h

@@ -29,16 +29,15 @@ class EncodingModel : public QAbstractTableModel {
 
   enum Column {
     EXTENSION = 0,
-    TYPE = 1,
-    DESCRIPTION = 2,
-    EXPLANATION = 3,
-    OPCODE = 4,
-    // NOTE: The field columns should be variable based on the maximum number of
-    // fields
-    FIELD0 = 5,
-    FIELD1 = 6,
-    FIELD2 = 7,
-    BIT_START = 8,
+    TYPE,
+    DESCRIPTION,
+    OPCODE,
+    // TODO(raccog): The field columns should be variable based on the maximum
+    // number of fields
+    FIELD0,
+    FIELD1,
+    FIELD2,
+    BIT_START,
     BIT_END = BIT_START + BIT_COLUMNS
   };