Remove textboxclass's firstcreate and clear, simplify initializations

As a result of the previous commit, textboxclass::clear() is now unused.
textboxclass::firstcreate() was already useless. So remove both those
functions and initialize the values in the textboxclass constructor.

desktop_version/src/Textbox.cpp

@@ -3,12 +3,6 @@
 
 textboxclass::textboxclass()
 {
-    firstcreate();
-}
-
-void textboxclass::firstcreate()
-{
-    //Like clear, only it creates the actual arrays, etc
     x = 0;
     y = 0;
     w = 0;
@@ -19,20 +13,6 @@ void textboxclass::firstcreate()
     timer = 0;
 }
 
-void textboxclass::clear()
-{
-    //Set all values to a default, required for creating a new entity
-    line.resize(1);
-    xp = 0;
-    yp = 0;
-    w = 0;
-    h = 0;
-    lw = 0;
-    tl = 0;
-    tm = 0;
-    timer = 0;
-}
-
 void textboxclass::centerx()
 {
     resize();

desktop_version/src/Textbox.h

@@ -10,10 +10,6 @@ class textboxclass
 public:
     textboxclass();
 
-    void firstcreate();
-
-    void clear();
-
     void centerx();
 
     void centery();