ci: bump Solana CLI to v2.2.7 (bundles modern cargo supporting edition2024)

Drops the cargo-features workaround since 2.2.7 platform-tools ship
with cargo >= 1.85, handling edition2024 natively.

Author: 0xfave

.github/workflows/ci.yml

@@ -52,11 +52,11 @@ jobs:
           path: |
             ~/.cache/solana
             ~/.local/share/solana
-          key: solana-${{ runner.os }}-v0001-stable
+          key: solana-${{ runner.os }}-v0001-2.2.7
 
       - name: Install Solana CLI
         if: steps.cache-solana.outputs.cache-hit != 'true'
-        run: sh -c "$(curl -sSfL https://release.anza.xyz/v2.1.14/install)"
+        run: sh -c "$(curl -sSfL https://release.anza.xyz/v2.2.7/install)"
 
       - name: Set Solana path
         run: echo "$HOME/.local/share/solana/install/active_release/bin" >> $GITHUB_PATH

Cargo.toml

@@ -1,5 +1,3 @@
-cargo-features = ["edition2024"]
-
 [package]
 name = "flux-dex"
 version = "0.1.0"