Revert "inWater" command

This reverts commit 1e20bace2e ,
because inWater command doesn't work and it looks, that it's useless.

DOCREF inWater

source/src/physics.cpp

@@ -771,12 +771,6 @@ void crouch(bool on)
     player1->trycrouch = on;
 }
 
-int inWater(int *type)
-{
-    if(hdr.waterlevel > (*type ? player1->o.z : (player1->o.z - player1->eyeheight))) return 1;
-    else return 0;
-}
-
 COMMAND(backward, "d");
 COMMAND(forward, "d");
 COMMAND(left, "d");
@@ -784,7 +778,6 @@ COMMAND(right, "d");
 COMMANDN(jump, jumpn, "d");
 COMMAND(attack, "d");
 COMMAND(crouch, "d");
-COMMAND(inWater, "i");
 
 void fixcamerarange(physent *cam)
 {