Hide Table_removeIndex() from extern callers

Table_removeIndex() needs to be called with care, e.g. Vector_compact()
needs to be called afterwards.  Do no call by accident from external
code.

Table.c

@@ -69,7 +69,7 @@ void Table_add(Table* this, Row* row) {
 // removing items.
 // Note: for processes should only be called from ProcessTable_iterate to avoid
 // breaking dying process highlighting.
-void Table_removeIndex(Table* this, const Row* row, int idx) {
+static void Table_removeIndex(Table* this, const Row* row, int idx) {
    int rowid = row->id;
 
    assert(row == (Row*)Vector_get(this->rows, idx));

Table.h

@@ -68,8 +68,6 @@ void Table_printHeader(const Settings* settings, RichString* header);
 
 void Table_add(Table* this, struct Row_* row);
 
-void Table_removeIndex(Table* this, const struct Row_* row, int idx);
-
 void Table_updateDisplayList(Table* this);
 
 void Table_expandTree(Table* this);