Revert "fallback to fallback_locale translation when requested translation line is empty (#34136)" (#34228)

This reverts commit 02e983e.

Author: driesvints

src/Illuminate/Translation/Translator.php

@@ -122,7 +122,7 @@ public function get($key, array $replace = [], $locale = null, $fallback = true)
             $locales = $fallback ? $this->localeArray($locale) : [$locale];
 
             foreach ($locales as $locale) {
-                if (! empty($line = $this->getLine(
+                if (! is_null($line = $this->getLine(
                     $namespace, $group, $locale, $item, $replace
                 ))) {
                     return $line ?? $key;

tests/Translation/TranslationTranslatorTest.php

@@ -104,17 +104,6 @@ public function testGetMethodProperlyLoadsAndRetrievesItemForFallback()
         $this->assertSame('foo', $t->get('foo::bar.foo'));
     }
 
-    public function testGetMethodProperlyLoadsAndRetrievesItemForFallbackWhenLineIsEmpty()
-    {
-        $t = new Translator($this->getLoader(), 'en');
-        $t->setFallback('lv');
-        $t->getLoader()->shouldReceive('load')->once()->with('en', '*', '*')->andReturn([]);
-        $t->getLoader()->shouldReceive('load')->once()->with('en', 'bar', 'foo')->andReturn(['baz' => '']);
-        $t->getLoader()->shouldReceive('load')->once()->with('lv', 'bar', 'foo')->andReturn(['foo' => 'foo', 'baz' => 'breeze :foo']);
-        $this->assertSame('breeze bar', $t->get('foo::bar.baz', ['foo' => 'bar'], 'en'));
-        $this->assertSame('foo', $t->get('foo::bar.foo'));
-    }
-
     public function testGetMethodProperlyLoadsAndRetrievesItemForGlobalNamespace()
     {
         $t = new Translator($this->getLoader(), 'en');