fix: remove xchain from legend (#1013)

## High Level Overview of Change

This PR removes `XChain` from the homepage legend.

### Context of Change

XLS-38 has been put on hiatus for now. If it starts moving back towards
being activated, we can revert this commit.

### Type of Change

- [x] Bug fix (non-breaking change which fixes an issue)

src/containers/Ledgers/Legend.tsx

@@ -39,7 +39,6 @@ export const Legend = () => {
     TransactionCategory.DEX,
     TransactionCategory.NFT,
     TransactionCategory.ACCOUNT,
-    TransactionCategory.XCHAIN,
     TransactionCategory.PSEUDO,
     TransactionCategory.UNKNOWN,
   ]

src/containers/Ledgers/test/Legend.test.tsx

@@ -27,7 +27,7 @@ describe(`Legend`, () => {
     expect(wrapper.find('.legend-heading')).toHaveLength(2)
     expect(wrapper.find('.legend-section')).toHaveLength(2)
     expect(wrapper.find(TransactionActionIcon)).toHaveLength(5)
-    expect(wrapper.find('.legend-category')).toHaveLength(7)
+    expect(wrapper.find('.legend-category')).toHaveLength(6)
     wrapper.unmount()
   })
   it(`renders open when localStorage entry 'explorer-legend-previous-interaction' is set to false`, () => {