std: Clean up some tests

No functional changes, remove some dead code.

Author: LemonBoy

lib/std/dwarf.zig

@@ -413,10 +413,7 @@ pub const DwarfInfo = struct {
         var this_unit_offset: u64 = 0;
 
         while (this_unit_offset < try seekable.getEndPos()) {
-            seekable.seekTo(this_unit_offset) catch |err| switch (err) {
-                error.EndOfStream => unreachable,
-                else => return err,
-            };
+            try seekable.seekTo(this_unit_offset);
 
             var is_64: bool = undefined;
             const unit_length = try readUnitLength(in, di.endian, &is_64);
@@ -520,10 +517,7 @@ pub const DwarfInfo = struct {
         var this_unit_offset: u64 = 0;
 
         while (this_unit_offset < try seekable.getEndPos()) {
-            seekable.seekTo(this_unit_offset) catch |err| switch (err) {
-                error.EndOfStream => unreachable,
-                else => return err,
-            };
+            try seekable.seekTo(this_unit_offset);
 
             var is_64: bool = undefined;
             const unit_length = try readUnitLength(in, di.endian, &is_64);

test/stage1/behavior/union.zig

@@ -742,7 +742,7 @@ test "@unionInit on union w/ tag but no fields" {
         const Data = union(Type) {
             no_op: void,
 
-            pub fn decode(buf: []const u8) !Data {
+            pub fn decode(buf: []const u8) Data {
                 return @unionInit(Data, "no_op", {});
             }
         };
@@ -753,7 +753,7 @@ test "@unionInit on union w/ tag but no fields" {
 
         fn doTheTest() void {
             var data: Data = .{ .no_op = .{} };
-            var o = try Data.decode(&[_]u8{});
+            var o = Data.decode(&[_]u8{});
             expectEqual(Type.no_op, o);
         }
     };