comctl32/tests: Remove a dead assignment in misc.c (Cppcheck)

[Bruno Jesus]

[dlls\comctl32\tests\misc.c:78] -> [dlls\comctl32\tests\misc.c:82]:
(performance) Variable 'count' is reassigned a value before the old
one has been used.
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diff --git a/dlls/comctl32/tests/misc.c b/dlls/comctl32/tests/misc.c
index 69a7db4..280b46c 100644
--- a/dlls/comctl32/tests/misc.c
+++ b/dlls/comctl32/tests/misc.c
@@ -75,7 +75,7 @@ static void test_GetPtrAW(void)
         static char dest[MAX_PATH];
         int sourcelen;
         int destsize = MAX_PATH;
-        int count = -1;
+        int count;
 
         sourcelen = strlen(source) + 1;