Clean up wrapper in flashinfer backend (#2638)

python/sglang/srt/speculative/spec_info.py

@@ -0,0 +1,19 @@
+from enum import IntEnum, auto
+
+
+class SpeculativeAlgorithm(IntEnum):
+    EAGLE = auto()
+
+    def is_eagle(self):
+        return self == SpeculativeAlgorithm.EAGLE
+
+    @staticmethod
+    def from_string(name: str):
+        name_map = {
+            "EAGLE": SpeculativeAlgorithm.EAGLE,
+        }
+        return name_map[name]
+
+
+class SpecInfo:
+    pass