Remove max-width limit on aligned blocks

[adamwoodnz]

Closes #141

Removes the max-width rule set on aligned blocks. This has never been used in our redesign themes and often needs to be overridden, see issue description.

Testing

Test in sandbox and remove this theme.json override from these themes Developer Resources, Documentation, Learn:

"custom": {
    "alignment": {
        "alignedMaxWidth": "$value"
    },
}