Function omitChars

omitChars(source: string, removeStart: number, removeLength: number): string
Returns source with a given number of characters removed from start position.
```
// Remove three characters starting at position 1
omitChars(`hello there`, 1, 3); // ie. removes 'ell'
// Yields: `ho there`
```
Parameters
- source: string
- removeStart: number
  Start point to remove
- removeLength: number
  Number of characters to remove
Returns string