Removed excess padding for the map sprites.

The map sprite doesn't need any padding as it is pixel-perfect.

Changes **[this](https://github.com/blackline/icarus-sprites/blob/da99c34637d2b39e5646e722f2ed8f607ee39abb/build/sprites-map.png)** to **[this](https://github.com/blackline/icarus-sprites/blob/951664388aa5ffe23afb514c83bca585dc9c9dfe/build/sprites-map.png)**. (570kb, 520x6938 **to** 470kb, 153x3672)

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icarus PR:

Jira story: [SW-4073](https://blacklinegps.atlassian.net/browse/SW-4073)