Remove useless variable lw from textboxclass

This variable is only assigned to, but never read from. Hence, it is
useless, and should be removed to make code analysis less complicated.

desktop_version/src/Textbox.cpp

@@ -6,7 +6,6 @@ textboxclass::textboxclass(void)
 {
     w = 0;
     h = 0;
-    lw = 0;
     tl = 0;
     prev_tl = 0;
     tm = 0;
@@ -117,7 +116,6 @@ void textboxclass::resize(void)
         if (len > (unsigned int)max) max = len;
     }
 
-    lw = max;
     w = (max +2) * 8;
     h = (line.size() + 2) * 8;
 }

desktop_version/src/Textbox.h

@@ -32,7 +32,7 @@ public:
 public:
     //Fundamentals
     std::vector<std::string> line;
-    int xp, yp, lw, w, h;
+    int xp, yp, w, h;
     int r,g,b;
     int tr,tg,tb;
     int timer;