manual code cleanups

Author: dfa1

writer/src/test/java/io/github/dfa1/vortex/writer/BitpackedEncodingTest.java

@@ -32,7 +32,7 @@ class BitpackedEncodingTest {
             List.of(new DType.Primitive(PType.I32, false)),
             false);
 
-    private static List<ScanResult> scanAll(VortexReader vf) throws IOException {
+    private static List<ScanResult> scanAll(VortexReader vf) {
         var results = new ArrayList<ScanResult>();
         var iter = vf.scan(ScanOptions.all());
         while (iter.hasNext()) {

writer/src/test/java/io/github/dfa1/vortex/writer/DeltaEncodingTest.java

@@ -32,7 +32,7 @@ class DeltaEncodingTest {
             List.of(new DType.Primitive(PType.I64, false)),
             false);
 
-    private static List<ScanResult> scanAll(VortexReader vf) throws IOException {
+    private static List<ScanResult> scanAll(VortexReader vf) {
         var results = new ArrayList<ScanResult>();
         var iter = vf.scan(ScanOptions.all());
         while (iter.hasNext()) {

writer/src/test/java/io/github/dfa1/vortex/writer/DictEncodingTest.java

@@ -31,7 +31,7 @@ class DictEncodingTest {
             List.of(new DType.Primitive(PType.I32, false)),
             false);
 
-    private static List<ScanResult> scanAll(VortexReader vf, ScanOptions opts) throws IOException {
+    private static List<ScanResult> scanAll(VortexReader vf, ScanOptions opts) {
         var results = new ArrayList<ScanResult>();
         var iter = vf.scan(opts);
         while (iter.hasNext()) {

writer/src/test/java/io/github/dfa1/vortex/writer/VortexWriterTest.java

@@ -37,7 +37,7 @@ class VortexWriterTest {
 
     // ── writeChunk validation ─────────────────────────────────────────────────
 
-    private static List<ScanResult> scanAll(VortexReader vf, ScanOptions opts) throws IOException {
+    private static List<ScanResult> scanAll(VortexReader vf, ScanOptions opts) {
         var results = new ArrayList<ScanResult>();
         var iter = vf.scan(opts);
         while (iter.hasNext()) {