refactor: remove throw from "calcFontSize"

utils/index.js

@@ -1,4 +1,4 @@
-const { toRem, modularScale, pipe, tail, map } = require('@typographist/core');
+const { toRem, modularScale } = require('@typographist/core');
 
 const ALL_CHARACTERS_AFTER_COLON = /:.+\b/;
 const ALL_PARENTHESES = /[()]/g;
@@ -61,24 +61,10 @@ const toEmOrNot = (x) => (hasPx(x) ? toEm(x) : x);
 // toPxOrNot :: String -> String
 const toPxOrNot = (x) => (hasEm(x) ? toPx(x) : x);
 
-// validBreakpointNames :: Object -> [String]
-const validBreakpointNames = pipe(
-  Object.keys,
-  tail,
-  map(toKebabCase),
-);
-
 // calcFontSize :: Object -> (Number | String, String) -> String
+// eslint-disable-next-line consistent-return
 const calcFontSize = (breakpoints) => (target, breakName = 'initial') => {
-  if (!breakpoints[breakName]) {
-    throw new Error(
-      `[typographist]: '${toKebabCase(
-        breakName,
-      )}' is invalid breakpoint name. Use '${validBreakpointNames(
-        breakpoints,
-      ).join(', ')}'.`,
-    );
-  } else {
+  if (breakpoints[breakName]) {
     const { root, base, ratio } = breakpoints[breakName];
 
     return toRem(root, modularScale(Number(target), base, ratio));