Remove has_letters in config template (#11465)

Due to problems with the javascript conversion in the website
quickstart, remove the `has_letters` setting to simplify generating
`attrs` for the default `tok2vec`.

Additionally reduce `PREFIX` as in the trained pipelines.

spacy/cli/templates/quickstart_training.jinja

@@ -271,13 +271,8 @@ factory = "tok2vec"
 [components.tok2vec.model.embed]
 @architectures = "spacy.MultiHashEmbed.v2"
 width = ${components.tok2vec.model.encode.width}
-{% if has_letters -%}
 attrs = ["NORM", "PREFIX", "SUFFIX", "SHAPE"]
-rows = [5000, 2500, 2500, 2500]
-{% else -%}
-attrs = ["ORTH", "SHAPE"]
-rows = [5000, 2500]
-{% endif -%}
+rows = [5000, 1000, 2500, 2500]
 include_static_vectors = {{ "true" if optimize == "accuracy" else "false" }}
 
 [components.tok2vec.model.encode]

spacy/cli/templates/quickstart_training_recommendations.yml

@@ -271,4 +271,3 @@ zh:
     accuracy:
       name: bert-base-chinese
       size_factor: 3
-  has_letters: false