backup.snapkey - removed unnecessary and duplicated keycodes

meta/backup.snapkey

@@ -9,6 +9,7 @@ key4=87
 
 # After applying the changes, please restart SnapKey.
 # For further help, visit the README.pdf file.
+# More about rebinding keys - github.com/cafali/SnapKey/wiki/Rebinding-Keys
 
 # -------------------------------------------------------------
 # Q D / Z S     AZERTY   Key1=81 Key2=68 / Key3=90 Key4=83
@@ -61,41 +62,10 @@ key4=87
 
 #Special Keys:
 
+# BACKSPACE - 8
+# SHIFT - 16
+# CONTROL - 17
+# ALT - 18
+# ESC - 27
 # SPACE - 32
-# ! - 33
-# " - 34
-# # - 35
-# $ - 36
-# % - 37
-# & - 38
-# ' - 39
-# ( - 40
-# ) - 41
-# * - 42
-# + - 43
-# , - 44
-# - - 45
-# . - 46
-# / - 47
-# 0 - 48
-# 1 - 49
-# 2 - 50
-# 3 - 51
-# 4 - 52
-# 5 - 53
-# 6 - 54
-# 7 - 55
-# 8 - 56
-# 9 - 57
-# : - 58
-# ; - 59
-# < - 60
-# = - 61
-# > - 62
-# ? - 63
-# @ - 64
-# { - 123
-# | - 124
-# } - 125
-# ~ - 126
-# DEL - 127
+# DEL - 46