resolve ruff check failing

Author: reniz-shah

strings/string_is_valid_number.py

@@ -8,52 +8,6 @@
 from enum import Enum
 
 
-class CharType(Enum):
-    NUMERIC = "NUMERIC"
-    SIGN = "SIGN"
-    EXPONENT = "EXPONENT"
-    DECIMAL = "DECIMAL"
-
-
-class State(Enum):
-    INITIAL = "INITIAL"
-    SIGNED = "SIGNED"
-    WHOLE = "WHOLE"
-    FRACTIONAL = "FRACTIONAL"
-    FRACTION = "FRACTION"
-    EXPONENTIAL = "EXPONENTIAL"
-    EXP_SIGN = "EXP_SIGN"
-    EXP_NUMBER = "EXP_NUMBER"
-
-
-state_machine: dict[State, dict[CharType, State]] = {
-    State.INITIAL: {
-        CharType.NUMERIC: State.WHOLE,
-        CharType.SIGN: State.SIGNED,
-        CharType.DECIMAL: State.FRACTIONAL,
-    },
-    State.SIGNED: {CharType.NUMERIC: State.WHOLE, CharType.DECIMAL: State.FRACTIONAL},
-    State.WHOLE: {
-        CharType.NUMERIC: State.WHOLE,
-        CharType.DECIMAL: State.FRACTION,
-        CharType.EXPONENT: State.EXPONENTIAL,
-    },
-    State.FRACTIONAL: {CharType.NUMERIC: State.FRACTION},
-    State.FRACTION: {
-        CharType.NUMERIC: State.FRACTION,
-        CharType.EXPONENT: State.EXPONENTIAL,
-    },
-    State.EXPONENTIAL: {
-        CharType.NUMERIC: State.EXP_NUMBER,
-        CharType.SIGN: State.EXP_SIGN,
-    },
-    State.EXP_SIGN: {CharType.NUMERIC: State.EXP_NUMBER},
-    State.EXP_NUMBER: {CharType.NUMERIC: State.EXP_NUMBER},
-}
-
-from enum import Enum
-
-
 class CharType(Enum):
     NUMERIC = "NUMERIC"
     SIGN = "SIGN"