message: Update search-a-2d-matrix-ii.py
  count variable is not required in this case.
diff: @@ -35,7 +35,7 @@ class Solution:
  if n == 0:
  return False
  - count, i, j = 0, 0, n - 1
  + i, j = 0, n - 1
  while i < m and j >= 0:
  if matrix[i][j] == target:
  return True
  