fix: don't default to 'latest' runtime version client-side

`version` is an optional parameter. The backend already has logic to
determine the most appropriate default value. Always passing a value
from the client side prevents us from leveraging that (smarter) logic.

Author: mpetazzoni

README.md

@@ -103,7 +103,8 @@ users may find useful:
     libraries like Shapely.
 * `version`: one of the WherobotsDB runtime versions that is available
     to you, if you need to pin your usage to a particular, supported
-    WherobotsDB version. Defaults to `"latest"`.
+    WherobotsDB version. Defaults to the latest, most-optimized version
+    of WherobotsDB available to your subscription.
 * `session_type`: `"single"` or `"multi"`; if set to `"single"`, then
     each call to `connect()` establishes an exclusive connection to a
     distinct and dedicated Wherobots runtime; if set to "multi", then

wherobots/db/constants.py

@@ -12,7 +12,6 @@
 
 DEFAULT_RUNTIME: Runtime = Runtime.TINY
 DEFAULT_REGION: Region = Region.AWS_US_WEST_2
-DEFAULT_VERSION: str = "latest"
 DEFAULT_SESSION_TYPE: SessionType = SessionType.MULTI
 DEFAULT_READ_TIMEOUT_SECONDS: float = 0.25
 DEFAULT_SESSION_WAIT_TIMEOUT_SECONDS: float = 900

wherobots/db/driver.py

@@ -24,7 +24,6 @@
     DEFAULT_READ_TIMEOUT_SECONDS,
     DEFAULT_SESSION_TYPE,
     DEFAULT_SESSION_WAIT_TIMEOUT_SECONDS,
-    DEFAULT_VERSION,
     MAX_MESSAGE_SIZE,
     PARAM_STYLE,
     PROTOCOL_VERSION,
@@ -88,14 +87,12 @@ def connect(
     host = host or DEFAULT_ENDPOINT
     runtime = runtime or DEFAULT_RUNTIME
     region = region or DEFAULT_REGION
-    version = version or DEFAULT_VERSION
     session_type = session_type or DEFAULT_SESSION_TYPE
 
     logging.info(
-        "Requesting %s%s runtime running %s in %s from %s ...",
+        "Requesting %s%s runtime in %s from %s ...",
         "new " if force_new else "",
         runtime.value,
-        version,
         region.value,
         host,
     )
@@ -111,7 +108,6 @@ def connect(
             json={
                 "runtimeId": runtime.value,
                 "shutdownAfterInactiveSeconds": shutdown_after_inactive_seconds,
-                "version": version,
                 "sessionType": session_type.value,
             },
             headers=headers,