remove blank lines after class opening (open-telemetry#1468)

add the php-cs-fixer no_blank_lines_after_class_opening rule and apply to codebase

Author: brettmc

.php-cs-fixer.php

@@ -29,6 +29,7 @@
     'include' => true,
     'lowercase_cast' => true,
     'new_with_parentheses' => true,
+    'no_blank_lines_after_class_opening' => true,
     'no_extra_blank_lines' => true,
     'no_leading_import_slash' => true,
     'no_trailing_whitespace' => true,

examples/src/ExampleConfig.php

@@ -8,7 +8,6 @@
 
 final class ExampleConfig implements InstrumentationConfiguration
 {
-
     public function __construct(
         public readonly string $spanName,
         public readonly bool $enabled = true,

examples/src/ExampleConfigProvider.php

@@ -16,7 +16,6 @@
  */
 final class ExampleConfigProvider implements ComponentProvider
 {
-
     /**
      * @psalm-suppress MoreSpecificImplementedParamType
      * @param array{

examples/src/ExampleInstrumentation.php

@@ -13,7 +13,6 @@
 
 final class ExampleInstrumentation implements Instrumentation
 {
-
     public function register(HookManagerInterface $hookManager, ConfigProperties $configuration, InstrumentationContext $context): void
     {
         $config = $configuration->get(ExampleConfig::class) ?? ExampleConfig::default();

src/API/Instrumentation/AutoInstrumentation/ConfigurationRegistry.php

@@ -8,7 +8,6 @@
 
 final class ConfigurationRegistry implements ConfigProperties
 {
-
     private array $configurations = [];
 
     public function add(InstrumentationConfiguration $configuration): self

src/API/Instrumentation/AutoInstrumentation/InstrumentationConfiguration.php

@@ -6,5 +6,4 @@
 
 interface InstrumentationConfiguration
 {
-
 }

src/API/Metrics/CounterInterface.php

@@ -8,7 +8,6 @@
 
 interface CounterInterface extends SynchronousInstrument
 {
-
     /**
      * @param float|int $amount non-negative amount to increment by
      * @param iterable<non-empty-string, string|bool|float|int|array|null> $attributes

src/API/Metrics/GaugeInterface.php

@@ -15,7 +15,6 @@
  */
 interface GaugeInterface extends SynchronousInstrument
 {
-
     /**
      * @param float|int $amount current absolute value
      * @param iterable<non-empty-string, string|bool|float|int|array|null> $attributes

src/API/Metrics/HistogramInterface.php

@@ -8,7 +8,6 @@
 
 interface HistogramInterface extends SynchronousInstrument
 {
-
     /**
      * @param float|int $amount non-negative amount to record
      * @param iterable<non-empty-string, string|bool|float|int|array|null> $attributes

src/API/Metrics/MeterInterface.php

@@ -6,7 +6,6 @@
 
 interface MeterInterface
 {
-
     /**
      * Reports measurements for multiple asynchronous instrument from a single callback.
      *