fix: remove confusing warning message (#5628)

In e050564, we added a warning message
that's shown when setting the mode on Build actions depended on byDeploys
that are being deployed in sync mode.

These messages were noisy and unclear, so we're removing them here.

core/src/graph/actions.ts

@@ -185,15 +185,6 @@ export const actionConfigsToGraph = profileAsync(async function actionConfigsToG
       const referencedBuildNames = [config.build, ...buildDeps.map((d) => d.name)].filter(isTruthy)
       for (const buildName of referencedBuildNames) {
         const buildKey = actionReferenceToString({ kind: "Build", name: buildName })
-        if (buildModeOverrides[buildKey]) {
-          const prev = buildModeOverrides[buildKey]
-          log.warn(dedent`
-            Using mode ${styles.highlight(prev.mode)} for Build ${styles.highlight(buildName)} as requested by\
-            the Deploy ${styles.highlight(prev.overriddenByDeploy)}.
-
-            Ignoring request by Deploy ${styles.highlight(config.name)} to use mode ${styles.highlight(mode)}.
-          `)
-        }
         actionModes[mode] = [buildKey, ...(actionModes[mode] || [])]
         buildModeOverrides[buildKey] = {
           mode,