0023604: Uninitialized variables in debug mode

Removed #ifndef DEB ... #else ... #endif directives where the variables were being initialized only in release mode.
Removed unused part of code.

src/Select3D/Select3D_SensitiveFace.cxx

@@ -87,11 +87,7 @@ Matches(const Standard_Real X,
         const Standard_Real aTol,
         Standard_Real& DMin)
 {
-#ifndef DEB
   Standard_Real DMin2 = 0.;
-#else
-  Standard_Real DMin2;
-#endif
   Standard_Real Xmin,Ymin,Xmax,Ymax;
   if(!Bnd_Box2d(mybox2d).IsVoid())
   {

src/Select3D/Select3D_SensitiveTriangle.cxx

@@ -98,10 +98,8 @@ Matches(const Standard_Real X,
   case Select3D_TOS_INTERIOR:
     Res = Status(X,Y,aTol,DMin);
     return (Res==0 || Res == 1);
-#ifndef DEB
   default:
     break;
-#endif
   }
   return Standard_True;
 }