Removed trailing spaces in the most relevant files

Command used for the job:
egrep -rl ' $' --include *.c --include *.h --include  *.s --include  *.inc --include  *.txt *  | xargs sed -i 's/\s\+$//g'

Credits to Grant Murphy from Stack Overflow.

src/battle_anim_psychic.c

@@ -493,7 +493,7 @@ static void AnimDefensiveWall_Step1(struct Sprite *sprite)
 
     if (IsBattlerSpriteVisible(battler))
         gSprites[gBattlerSpriteIds[battler]].invisible = TRUE;
-    
+
     battler = BATTLE_PARTNER(battler);
     if (IsBattlerSpriteVisible(battler))
         gSprites[gBattlerSpriteIds[battler]].invisible = TRUE;
@@ -957,7 +957,7 @@ void AnimTask_ExtrasensoryDistortion(u8 taskId)
     u8 yOffset;
     struct ScanlineEffectParams scanlineParams;
     struct Task *task = &gTasks[taskId];
-    
+
     yOffset = GetBattlerYCoordWithElevation(gBattleAnimTarget);
     task->data[14] = yOffset - 32;
 
@@ -1056,7 +1056,7 @@ void AnimTask_TransparentCloneGrowAndShrink(u8 taskId)
     s16 spriteId;
     s16 matrixNum;
     struct Task *task = &gTasks[taskId];
-    
+
     matrixNum = AllocOamMatrix();
     if (matrixNum == 0xFF)
     {