Do not support = for bond in chemical name

Author: lars-petter-hauge

backend/src/acidwatch_api/models/gibbs_minimization_model.py

@@ -147,7 +147,6 @@ class GibbsMinimizationModelAdapter(BaseAdapter):
         "(CH3)2CHCH3": "i-butane",
         "CH3CH2CH2CH3": "n-butane",
         "CH3(CH2)3CH3": "n-pentane",
-        "CH2=CH2": "C2H4",
         "C6H5CH3": "toluene",
         "C6H4(CH3)2": "o-Xylene",
     }

frontend/src/constants/formula_map.tsx

@@ -37,7 +37,6 @@ export const FORMULA_TO_NAME_MAPPER: Record<string, string> = {
     "(CH3)2CHCH3": "i-butane", // 6360, C4H10
     CH3CH2CH2CH3: "n-butane", // 7843, C4H10
     "CH3(CH2)3CH3": "n-pentane", // 8003, C5H12
-    "CH2=CH2": "ethylene", // 6325, C2H4
     C6H5CH3: "toluene", // 1140, C7H8
     "C6H4(CH3)2": "o-Xylene", // 7237, C8H10
 };